[BIC-announce] FW: postdoc position

[Jennifer Chew, Ms.]

FORWARDING ON BEHALF OF PIERRE HELLIER.  Jennifer 
 
________________________________

From: Pierre Hellier [mailto:Pierre.Hellier at irisa.fr] 
Sent: Tuesday, March 06, 2007 4:32 AM
To: Jennifer Chew, Ms.
Subject: postdoc


Dear Jennifer, 

We have a postdoc offer for the end of the year. Could you please pass
this on to the BIC mailing list?
Hope everything is fine in MTL..
Cheers, pierre

---------------------
Post-doctoral position - Image-guided neurosurgery - INRIA
Deadline: 31 March 2007
Email: Pierre.Hellier at irisa.fr, Pierre.Jannin at irisa.fr

http://www.irisa.fr/visages/positions-eng.html
http://www.irisa.fr/visages/documents/IntraoperativeDeformation_postdoc.
pdf

Topic: Coupling surface-based and volume-based approaches to quantify
intraoperative brain deformations. 

This postdoctoral position deals with the detection and correction of
intraoperative brain 
deformations. Image guided neurosurgery systems (IGNS) enable to merge
the preoperative 
images with the operating field, under the hypothesis of a rigid
transformation. Unfortunately, 
the brain deforms non-rigidly during surgery and this limits drastically
the applicability of such 
IGNS systems. Image-guided neurosurgery should overcome this pitfall,
hopefully leading to 
reduced morbidity and mortality for the patients. 
The visages team is developing two approaches to correct for brain
shift. The first one is 
surface-based, relying on a 3D stereoscopic reconstruction of the
surgical field and video 
analysis, given the images acquired with the microscope. The second one
is volumetric and 
builds on non-rigid registration of 3D freehand ultrasound acquired
during surgery. These two 
methods have different characteristics in terms of temporal update rate
(the surface-based 
approach can be used continuously), dimensionality (2D versus 3D) and
input features. They 
are therefore intrinsically complementary. 
The purpose of the postdoctoral position is to design a cooperative
methodological 
framework to correct for brain deformations according to both methods.
Such framework 
should investigate deeply the complementarities between the two
approaches in terms of 
consistency and reliability. The work should also be concerned with the
validation of the 
deformation estimation, given either sparse intraoperative measures as
given by the IGNS 
pointer or postoperative images. Such validation will be useful to
assess the respective 
contribution of the two approaches to the correction of brain
deformations. This will be 
particularly relevant to determine which correction method should be
used at a particular step 
of surgery. 
The work will be in close collaboration with the neurosurgery department
at Rennes 
University Hospital, where experiments in the operating room will be
conducted. 
 
12 months contract, to be renewed for a year. 
The position should start during fall 2007. 
Salary: 2350 euros gross/month. 
 
The candidate should have a background in medical image analysis,
non-rigid registration, 
intraoperative imaging and programming skills (C++). 


-----------------
Pierre Hellier
IRISA - INRIA, Campus de Beaulieu
35 042 RENNES Cedex France
tel : +33 (0)299.84.25.23, fax : +33 (0)299.84.71.71
http://www.irisa.fr/visages/team/Pierre.Hellier-eng.html


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